Back cover for portable electronic device



FIG. 1 is a perspective view of a back cover for a portable electronic device showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a reference view showing a state of being used thereof.

The broken lines shown in the figures are for illustrative purposes only and do not form part of the claimed design. 

The ornamental design for a back cover for a portable electronic device, as shown and described. 